Metalworking and the Smith
Iron is found in iron ore (rock) and the first stage of ironmaking is to extract
the metal from the ore. This is best done at the place where the iron ore is dug
out of the ground, otherwise a lot of waste material has to be carried about. It
is thought that iron was brought to Jorvik (York) as ingots (bars of iron)
already extracted from the ore. Some probably came from the
Lake District, the North York Moors; some came from
Scandinavia where richer ores are to be found. Once in Jorvik, the ingots
could be heated up again by smiths who could then forge (hammer) them into the
shapes they wanted. Or it could be melted right down again and cast (poured)
into ready-shaped stone or clay moulds. After casting, some more work could be
done on the object to finish it - filing, re-heating and forging, polishing and
perhaps putting some sort of decoration on.
Steel is iron which has been combined with fairly pure carbon and it is much
better than iron for keeping a sharp edge. But good steel was difficult to make
in the Viking Age and probably only small quantities could be made at any one
Steel had to be used sparingly, so it was used for the cutting edges and
points of iron tools and weapons. An expensive and very strong knife, sword or
axe could be made by forging alternate layers of iron and steel together. To
decorate iron items, strips of steel, copper or precious metals could be inlaid
in them during forging.
Some metalworking techniques and terms
- Heating metal in a furnace or hearth until it is red- or white-hot, then
hammering, bending and punching it into shape.
- Heating metal until it is liquid, then pouring it into ready-shaped moulds
(made of stone, clay or sand) and allowing it to cool and set.
- Fastening two or more pieces of material together. Matching holes are made
in the pieces, then a rivet (peg) is pushed through the holes and hammered
over tightly at each side to form 'mushroom' heads which clamp the pieces
together. If the pieces being fastened together are metal, then the rivet is
heated up and as it cools and contracts it tightens. Soft metal rivets can
be used for 'cold' rivetting where heat would be undesirable (such as
rivetting bone or wooden handle strips to a knife blade).
- A process for bonding metal pieces by heating them to red or white heat
then hammering them together so they fuse into one. Pattern-welding was done
by welding strips of a different metal to the surface of, for example, a
- An enclosed oven-like structure, made of stone or clay (or clay-lined
stone) in which iron can be extracted from its ore. The ore would be placed
in the furnace on a bed of wood or charcoal and the chamber brought to a
high temperature using bellows, blowing into the furnace through a nozzle (tuyère).
A simple, primitive furnace may have no bellows but rely on an opening
facing the wind but it would be impossible to reach really high temperatures
this way. A small opening in the top of the furnace allows smoke to escape.
The process is known as smelting and the smelted metal runs out of the ore
and either gathers at the base of the furnace or is run off into moulds to
set as ingots.
- An open furnace, used by smiths to re-heat ingots and metal items ready
for shaping. Hearth temperature would be raised by the use of bellows. The
normal fuel would be charcoal.
- A device for directing a stream of air at fuel in a furnace or hearth, so
that it has a rich supply of oxygen. This makes the burning fierce for the
high temperatures needed for smelting ore or working metal. A simple bellows
might be a hide or skin bag with a fine outlet nozzle of metal, wood or
bone. Squeezing and pulling the bag would produce the stream of air which is
directed at the fuel. It would normally be the job of an ironmaker's or
blacksmith's assistant, or an apprentice, to do the pumping.
- A hard block on which the smith forges, bends, stretches, welds and
punches metal. A strong flat stone would serve the purpose - or even a tree
stump with a flat stone or flat metal plate on top. The best anvil, though,
is one made entirely of cast iron, with a smooth, flat surface on top, a
tapering 'beak' at one end, and some holes for punching through. A large
all-iron anvil would be difficult to make in the Viking Age because of the
great mass of cast iron needed at one time. A small anvil was found by
archaeologists at the Jorvik site.
- Bonding light or soft metal together with molten tin, lead, silver or
gold, or alloys of these metals.
- Bonding light or soft metal together with molten brass or copper alloys.
- A craftsman who works mainly with iron and steel. Often called simply a
'smith' and in the Viking Age a smith would often be an all-round
metalworker, working with copper, bronze, lead, tin, and precious metals, as
well as iron and steel. In later times, each type of metal had its own
specialist craftsmen, such as silversmiths, tinsmiths, and so on. In Jorvik,
smiths may have been involved in the minting
of coins and making and repairing jewellery.
- One who makes and fits shoes to horses. Farriery was normally part of a
- A mixture of two or more metals. Bronze, for example, is an alloy of
copper and tin.
- Giving one metal a thin coating of another metal to improve its
appearance, for decoration, or to protect the core metal against corrosion.
Plating processes in the Viking Age would probably have been crude and may
simply have involved briefly dipping the core object in the molten plating
metal, or melting the plating metal over the object. Tin, tin-lead alloy and
copper alloy plated items have been found at Jorvik.
- Plunging hot metal into water after it has been forged to shape. It is
important to judge exactly the right time to do this. If it is done too soon
the metal may become brittle and shatter easily; but leave it too long to
quench and the metal may be too soft to sharpen into an edge. Sometimes, it
is necessary to re-heat metal to the correct temperature before quenching
it. The smith's skill with quenching iron/steel is in watching the colour
change as it cools from near-white, to bright red, through to cherry red,
then very dark red. Quenching takes place when the colour is judged correct
for the purpose of the item, such as cutting, chiselling, striking, or
bending. Steel can be specially quenched (tempered) by plunging it into oil
instead of water; this makes it slightly springy and able to bend in a way
that would shatter iron or untempered steel.
The skills and processes of working metal (especially iron) were a mystery to
most people in ancient and Viking times and were thought by superstitious people
to be magical. 'Magical' iron and skilled smiths feature in the myths and
legends of the Anglo-Saxon, Scandinavian and other Germanic peoples. A
well-known mythical figure is Weyland
the Smith. The iron horseshoe - one of the typical products of the smith -
is still regarded as a 'magical' symbol today and is hung on walls and doors to
bring good luck (but only if the curved part is at the bottom, otherwise the
luck 'falls out' !).
Smiths probably added to the sense of mystery by carefully guarding the
secrets of their craft, revealing them only to their chosen apprentices, who
would often be their own sons or other members of the family. This made the
smith an important figure in the community and every village probably had its
own smith, or family of smiths, which is why the family
name Smith is the most common one in Great Britain, with equivalents in many
other countries. This shows how important was the smith and his work in many
parts of the world. Rulers and important noblemen would often have their own
personal smith. A Viking Age trading town like Jorvik (York) would have had work
for several smiths at any one time.